CLTM Functional and Motor Sensory Mapping and Imaging Studies fully solved graded A+

CLTM Functional and Motor Sensory Mapping and Imaging Studiesrecommended frequency bandpass for ECOG - correct answer 0.5-70Hz sensitivity 30-50uV/mm 3D modeling technique used to visually represent neural tracts using data collected by DTI - correct answer MRS tractography used to show structural abnormalities of white matter pathways in the brain and spinal cord, allowing for visualization of language and memory networks - correct answer MRS tractography measure brain activity by detecting associated changes in blood flow - correct answer fMRI noninvasive alternative to intraoperative cortical stim and Wada - correct answer fMRI 2 types of non-invasive motor function mapping procedures - correct answer TMS fMRI allows for comparison of amplitude between channels; montage used for mapping - correct answer Laplacian uses spike localization to ID language dominance - correct answer MSI MSI - correct answer -magnetic source imaging -ID neuroanatomic focus of expressive and receptive language functions -determines functional integrity of mesial temporal structures -a non-invasive alternative to ECS and Wada DTI (diffusion tensor imaging) - correct answer -an imaging method that uses a modified MRI scanner to reveal bundles of myelinated axons in the living human brain -gives gradients in white matter Wada technique - correct answer -amobarbital is injected into internal carotid artery -temporarily inactivates IPSILATERAL hemisphere to allow independent testing of memory and language in the CONTRALATERAL hemisphere -can predict the risk for memory decline following temporal lobectomy angiogram before Wada - correct answer looks at blood flow within the brain to make sure the Circle of Willis is intact- do not want crossover during Wada test how to test for successful injection of Wada - correct answer -ask pt to hold up their hands -once injection is given, there is loss of tone in the contralateral arm major findings on MRI - correct answer MTS tumors vascular formatin